Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5GDR callsign genealogy
Currently held by KOLBE, ULRICH
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by W5GDR's current licensee, walking backwards.
- KOLBE, ULRICHCAgranted 2023-10-24cancelled 2026-08-11
Successor callsigns
Callsigns held now by people who previously held W5GDR.
- KOLBE, ULRICHCAgranted 2023-10-24cancelled 2026-08-11
All historical holders
Every license row we've seen with the callsign W5GDR, oldest first.
- KOLBE, ULRICH CA2007-09-05 → cancelled 2013-11-30
- KOLBE, ULRICH CA2026-08-11 active